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If my house is all slab, with very little dirt around it, how do I create trenches?

Is there any recommended spray on products or are those not effective since termites do not appear on surfaces?

Answer:

Since termites do not usually come within 2-3 inches of the top soil, spraying the top surface of the ground with a termicide such as Termidor SC will not have any effect on Subterranean Termites. Doing a barrier soil treatment around the perimeter of home with Termidor SC will give you a 10 year barrier protection against termites. In the areas where there is dirt, dig a 6x6 inch trench pouring 4 gallons of mixed solution every 10 lineal feet (.8 fl oz per gallon of water) For your garage, porch, patios, or other contiguous slabs against the home where you cannot trench, you will drill holes to ensure the termiticide reaches the soil underneath the concrete. Using a hammer drill with a 1/2" x 18" drill bit, drill holes through the concrete about 2 to 3 inches away from the wall or foundation, and about every 10"-12" apart, only on the seam where the concrete is against the foundation. The deeper the better. Once the holes are drilled, you fill at the same rate you did the trench, 4 gallons per 10 feet. This works out to be a little less than half a gallon per hole. It is difficult to get 4 gallons per 10 feet in the holes, so it is important that you use a long drill bit, at least 18" long so you can bore out enough dirt to hold the termiticide. Sometimes the ground is slow to soak up the termiticide you place in the holes. You may need to fill the holes, then go work on something else for an hour, come back and fill them again, go work on something else.....3 to 4 times to get the proper amount down the holes. Once the holes are filled all you need to do is patch them with a concrete patch filler you can buy at Home Depot or you can use our Trebor plugs that will close the hole with no concrete mess.